Sheet Metal Bend Deduction Formula

Therefore the bend allowance added to the flange lengths is equal to the total flat.

Sheet metal bend deduction formula.

The formula is as follows. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. Understanding the bend allowance and consequently the bend deduction of a part is a crucial first step to understanding how sheet metal parts are fabricated. The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend.

With this free online tool we quickly get the sheet metal bend deduction and therefore the sheet metal blank initial flat length from the finished part measurements. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. The flatten length of the parts that are lf equals d1 plus d2 minus the bend deduction. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal.

Bd bend deduction. Another method that solidworks uses is the bend deduction method. As with bend allowance bend deduction comes from the same sources tables and manual testing. The formed bend radius is dependent upon the dies used the material properties and the material thickness.

Sheet metal calculator bend allowance equations and calculator. Cells on the right will output the desired values. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. We will start by calculating the bend allowance.

You only have to insert interior angle flange lengths k factor inside radius and material thickness. Lf d1 d2 bd. Understanding the bend deduction and consequently the bend allowance of a part is a crucial first step to understanding how sheet metal parts are fabricated. Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees.

After bending the sheet we need to do some measurements as shown in figure 2. From there we can calculate the k factor and the bend deduction. The bend radius refers to the inside radius.